A coma is a state of prolonged unconsciousness, which can be caused by one of many, many things. Many people believe that even if a person is in a coma, s/he can still hear you if you speak to him/her.

"Hey there, Grandma. I hope you wake up from that dreadful coma soon. I miss your cooking--"

*Nurse leaves*

"I'm going to spray some whipped cream up your asshole, and THERE'S NOTHING YOU CAN DO ABOUT IT! Haw haw haw!"

The period after one starts a new relationship, during which one loses contact with one's friends because one is devoting all one's time to one's significant other. Usually preceded by "boyfriend" or "girlfriend" for clarity.